Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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The Study on the Verification of the Blasting Effect of Blast Stemming Material and Plug Device

발파전색재료 및 플러그 장치의 발파효과 검증 연구

  • Ko, Young-Hun (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 고영훈 (한국건설기술연구원 지반연구본부)
  • Received : 2022.08.16
  • Accepted : 2022.08.23
  • Published : 2022.08.31
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Abstract

This study conducted tunnel blasting to evaluate the blasting effect of a shear thickening fluid-based blasting stemming material and a sealed plug device under development. STF single stemming and STF stemming materials were combined with plugs to a tunnel blasting to which the SAV-Cut method was applied, and the advanced rate and fragmentation of tunnel blasting muck pile were compared when sand stemming was used. Tunnel advanced rate was evaluated using a 3D laser scanner. When the STF stemming material and STF stemming material with the plug were compared to the sand stemming material, it increased by 5.7 and 5.36%, respectively. As a result of evaluation of the fragmentation of tunnel blasting muck pile, it was the best when the STF stemming material was applied, and it decreased by about 61% compared to the case of sand stemming blasting. However, no significant improvement in blasting effect was observed with the application of plug devices.

본 연구에서는 개발 중인 전단농화유체(shear thickening fluid) 기반의 발파전색재료와 밀폐 플러그 장치의 효과를 평가하기 위하여 터널발파를 수행하였다. SAV-Cut공법을 적용하고 있는 터널현장에 STF 단일전색 및 STF 전색재를 플러그와 결합하여 적용하였고, 기존 방식의 모래전색을 적용한 케이스와 굴진율 및 파쇄입도를 비교하였다. 터널 굴진율은 3차원 레이저 스캐너를 이용하여 평가하였다. STF 전색재료와 STF 전색재료에 플러그를 결합한 경우 모래전색 대비 각 5.7, 5.36% 정도 굴진율이 향상되는 것을 확인하였다. 파쇄입도의 경우 STF 전색재료를 적용하였을 경우 가장 좋게 나타났으며, 모래 전색케이스와 비교하였을 때 약 61% 파쇄입도가 감소하였다. 그러나 플러그 장치적용에 따른 뚜렷한 발파 효과 향상은 관찰되지 않았다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원의 주요사업(22주요-대5-중기지원국내-기술사업화) "고속 충격파 반응형 전단농화유체를 이용한 발파전색 기술개발"의 지원으로 수행되었습니다.

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